a(n)^2 is smallest square starting with a string of n 7's.

A034990

a(n)^2 is smallest square starting with a string of n 7's.

Terms

    a(0) =27a(1) =88a(2) =882a(3) =8819a(4) =278886a(5) =881917a(6) =8819171a(7) =8819171a(8) =2788866754a(9) =2788866755a(10) =27888667551a(11) =881917103688

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